Yaskawa PC NC - Manual (Page 164)

4 - 2
YASNAC PCNC Operating Manual Chapter 4: Maintenance
4.1 MAINTENANCE DATA
To locate the cause of problems or when contacting your Yaskawa representative for advice, it
is very important that users precisely understand the actual situation. To minimize the downtime,
check the following points carefully.
4.1.1 Checking the Status of Problems
(1) Understanding the Situation
To identify the nature of the problem, first check the following items.
• Type of operation that causes a problem.
Do other types of operations not cause problems?
• Q Details of problems.
How, frequency (always or sometimes), and when?
• Unusual situation when the problem occurred.
• Was there an unusual external occurrence (such as power failure or lightning) when
the problem occurred?
• Timing of problem occurrence.
Had the problem occurred during or after the operation of the keys or in a specific
operation mode?
(2) Check Items
(a) Problems related with axis feed and spindle drive
Check the following items.
• Indication status of the LEDs on the drive unit
• Fuses and breakers
• Timing of problem occurrence – when the power is turned ON, during acceleration,
during deceleration or during fixed speed spindle rotation, etc.?
(b) Problems related to part program
Record the program block data, offset data, workpiece coordinate system offset data,
coordinate system setting data, etc.
CAUTION!
• When an alarm occurs, eliminate the fault and assure operation safety before resetting it.
Failure to observe this caution could result in equipment malfunction.
• For details on trouble relating to the machine-related sequence, refer to the machine tool manual.